Sink



FIG. 1 is a perspective view of the sink showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side being a mirror image of the left side;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a second embodiment of the design of FIG. 1, the only difference being in the shape of the interior of the sink;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines in the drawings are shown for environmental purposes only and form no part of the claimed design. 

The ornamental design for a sink, as shown and described. 